Merge branch 'release/v0.4.3' into experimental
Restored version and docs for experimental branch
Session#find_login_form: Store cookies of the login form page
AutoLogin: All responses now update the framework cookies
Proxy: Fixed out-of-scope error for TemplateScope helper class
path_traversal: Added more fingerprints for /etc/passwd

[Issue #351]
Bumped version to 0.4.3.1 and updated README
Merge branch 'release/v0.4.3.1'